Estimation of ground thermal conductivity through indicator kriging: Nation-scale application and vertical profile analysis in Japan

Estimation of ground thermal conductivity through indicator kriging: Nation-scale application and vertical profile analysis in Japan
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通过指示克里金法估算地面导热系数:日本的全国范围应用和垂直剖面分析

DOI:
10.1016/j.geothermics.2020.101881
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
K. Nagano
K. Nagano
中科院分区:
--
文献类型:
--
作者:
Yoshitaka Sakata;T. Katsura;K. Nagano

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演示了在日本0.5公里的常规单元上,利用指示克里金法和周围200米深处每隔5米的钻孔数据估算地面导热率的方法。八种土壤/岩石类型的发生概率估计其最可能的厚度,并用作估计地面导热系数的权重。确定每种土壤/岩石类型的个别热导率,以获得估计和现场测量之间的地面热导率的充分协议。估计是在陆地上进行的,有4.6万个钻孔数据。关东地方地图显示了土壤/岩石类型和地面热导率与五个地形类别的关系。平均10公里的单元图日本表明,由于地质复杂性,即使在相邻的单元之间的地面热导率的突然变化。地面导热系数的垂直增加,在所有的地形类别中进行了统计观察,每个位置的垂直分布遵循对数曲线没有或有一个高峰。
The estimation of ground thermal conductivity using indicator kriging and surrounding borehole data at 5-m intervals to a depth of 200 m on regular 0.5-km cells of Japan was demonstrated. The probabilities of occurrence of eight soil/rock types were estimated for their most likely thicknesses and used as weights for estimation of ground thermal conductivity. Individual thermal conductivity of each soil/rock type is determined to obtain sufficient agreements of ground thermal conductivities between estimates and in-situ measurements. The estimation was performed over the land with 46 thousand borehole data. Local maps of Kanto showed the relation of soil/rock types and ground thermal conductivities with five topographic categories. Averaged 10-km-cell maps of Japan indicated the sudden changes of ground thermal conductivity even among adjacent cells due to geologic complexity. Vertical increases of ground thermal conductivity were statistically observed in all topographic categories, and the vertical profile of each location followed a logarithmic curve without or with a peak.
DOI: --
发表时间: 2011
期刊: 日本木材学会大会研究発表要旨集
影响因子: --
作者:
中川貴文;河合直人;三宅辰哉;槌本敬大
通讯作者: 槌本敬大